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En utveckling av den s. k. väte-ekonomin, där vätgas (H2) används som energibärare, skulle – rent teoretiskt – kunna lösa människans energiproblem då vatten skulle kunna användas som bränsle. För att nå detta mål krävs dock väsentlig teknologisk och vetenskaplig utveckling. Ur ett rent vetenskapligt perspektiv, måste bl a (energisnåla) kemiska metoder att skapa stora mängder vätgas utvecklas. MångAbstract – The mixed-valence triiron complexes [Fe3(CO)7-x(PPh3)x(µ-edt)2] (x = 0, 1, 2; edt = SCH2CH2S) and [Fe3(CO)5(κ2-diphosphine)(µ-edt)2] (diphosphine = dppv, dppe, dppb, dppn) have been prepared and structurally characterized. In comparison to the diiron complex [Fe2(CO)6(µ-edt)], [Fe3(CO)7(µ-edt)2] catalyzes proton reduction at 0.36 V less negative potentials, which is a significant energe

In a future fossil-free circular economy, the petroleum-based plastics industry must be converted to non-fossil feedstock. A known alternative is bio-based plastics, but a relatively unexplored option is deriving the key plastic building blocks, hydrogen and carbon, from electricity through electrolytic processes combined with carbon capture and utilization technology. In this paper the future dem

Kommentarer till Johan P. Olsens artikel “Lorenzettis utfordring og demokratiets århundre”. Redaktionen har bett några svenska statsvetare att fritt kommentera den text av Johan P. Olsen som publiceras i detta nummer av Statsvetenskaplig tidskrift.

Structural change consists of the long-term changes in the sectoral composition of output and employment. We introduce a structural change perspective to the study of income inequality in 27 countries of the developing world for the period 1960–2010. The service sector has become the main employer, but the agricultural sector is central to the income distribution because poverty is mostly rural, a

Clinical education is a significant part of nursing education on all levels of education. A lot of effort is made by educational providers to prepare the students for their clinical placement (Levett-Jones et al., 2015). At best, this is a shared enterprise, involving representatives from the profession in creating a useful clinical placement for the students. However, the strain on clinical nurse

This article analyses some young men’s specific ways of retelling victims’ experience when the perpetrators have an immigrant background. In qualitative interviews with twenty young men, fear of being seen as intolerant was distinguished by their expressive caution. This involved using various aligning actions: presenting disclaimers and accounts, but also in terms of hesitant speak, re-takes and This article analyses some young men’s specific ways of retelling victims’ experience when the perpetrators have an immigrant background. In qualitative interviews with twenty young men, fear of being seen as intolerant was distinguished by their expressive caution. This involved using various aligning actions: presenting disclaimers and accounts, but also in terms of hesitant speak, re-takes and

Scholarly communication is complex. The clarification of concepts like “academic publication”, “document”, “semantics” and “ontology” facilitates tracking the limitations and benefits of the media of the current publishing system, as well as of a possible alternative medium. In this paper, requirements for such a new medium of scholarly communication, labeled Scholarly Network, have been collected

In this paper, optimal resource allocation policies are characterized for wireless cognitive networks under the spectrum leasing model. We propose cooperative schemes in which secondary users share the time-slot with primary users in return for cooperation. Cooperation is feasible only if the primary system's performance is improved over the non-cooperative case. First, we investigate a scheduling

It is well known that Max-Weight type scheduling algorithms are throughput optimal since they achieve the maximum throughput while maintaining the network stability. However, the majority of existing works employing Max-Weight algorithm require the complete channel state information (CSI) at the scheduler without taking into account the associated overhead. In this work, we design a Scheduling and

We investigate the network stability problem when two users are scheduled simultaneously. The key idea is to simultaneously transmit to more than one users experiencing different channel conditions by employing hierarchical modulation. For two-user scheduling problem, we develop a throughput-optimal algorithm which can stabilize the network whenever traffic load is stabilizable (i.e., it is within